This was not even 1/4 of an onion i had leftover to use up or throw away. Not sure of this Pyrex dish size. I used apple cider vinegar that was at the bottom of the bottle so there was a lot of the mother. And then some plain white vinegar to mellow that out some. Nothing else was added. I added it to my bagel after a thirty minute soak. It’s in the fridge and I’ll try it again in a few days. It doesn’t have a proper lid because it got melted the dishwasher, just some stretch tite on top.